1 /* 2 * Copyright (C) 2012 ARM Ltd. 3 * Author: Marc Zyngier <marc.zyngier@arm.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 */ 18 19 #ifndef __ASM_ARM_KVM_ARCH_TIMER_H 20 #define __ASM_ARM_KVM_ARCH_TIMER_H 21 22 #include <linux/clocksource.h> 23 #include <linux/hrtimer.h> 24 #include <linux/workqueue.h> 25 26 struct arch_timer_kvm { 27 #ifdef CONFIG_KVM_ARM_TIMER 28 /* Is the timer enabled */ 29 bool enabled; 30 31 /* Virtual offset */ 32 cycle_t cntvoff; 33 #endif 34 }; 35 36 struct arch_timer_cpu { 37 #ifdef CONFIG_KVM_ARM_TIMER 38 /* Registers: control register, timer value */ 39 u32 cntv_ctl; /* Saved/restored */ 40 cycle_t cntv_cval; /* Saved/restored */ 41 42 /* 43 * Anything that is not used directly from assembly code goes 44 * here. 45 */ 46 47 /* Background timer used when the guest is not running */ 48 struct hrtimer timer; 49 50 /* Work queued with the above timer expires */ 51 struct work_struct expired; 52 53 /* Background timer active */ 54 bool armed; 55 56 /* Timer IRQ */ 57 const struct kvm_irq_level *irq; 58 #endif 59 }; 60 61 #ifdef CONFIG_KVM_ARM_TIMER 62 int kvm_timer_hyp_init(void); 63 int kvm_timer_init(struct kvm *kvm); 64 void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, 65 const struct kvm_irq_level *irq); 66 void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu); 67 void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu); 68 void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu); 69 void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu); 70 #else 71 static inline int kvm_timer_hyp_init(void) 72 { 73 return 0; 74 }; 75 76 static inline int kvm_timer_init(struct kvm *kvm) 77 { 78 return 0; 79 } 80 81 static inline void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, 82 const struct kvm_irq_level *irq) {} 83 static inline void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu) {} 84 static inline void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu) {} 85 static inline void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu) {} 86 static inline void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu) {} 87 #endif 88 89 #endif 90